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Excel's Formula - sisman

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Figure 17-15: Using a surface chart to plot a function with two variables.<br />

Chapter 17: Charting Techniques 453<br />

Figure 17-16 shows a general-purpose, two-variable plotting application, similar to the singlevariable<br />

workbook described in the previous section. The data for the chart is a 25 x 25 data table<br />

in range M7:AL32 (not shown in the figure). To use this application<br />

1. Enter a formula in cell B3. The formula should contain at least one x variable and at least<br />

one y variable.<br />

In the figure, the formula in cell B3 is<br />

=SIN(x)*COS(y*x)<br />

2. Enter the minimum x value in cell B4 and the maximum x value in cell B5.<br />

3. Enter the minimum y value in cell B6 and the maximum y value in cell B7.

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